Images

The Images section checks raster images placed inside a PDF (not standalone image uploads — those use a Raster profile). Effective resolution is measured at the image’s placed size, so a high-megapixel photo scaled up on the page can still fail. Each check lists its action, settings, and the messages the customer sees. See the profile overview for how actions work.

Minimum Resolution

The lowest acceptable effective resolution (DPI) at print size.

Field	Detail
Action	Warn
Settings	Minimum (dpi, default 150)
Issue	One or more images are too low-resolution (`{actual.min}` DPI) and will look blurry in print. The minimum is `{target.effective}` DPI at print size.
Fix	Replace the low-resolution images with higher-resolution versions and re-upload.

Maximum Resolution

Flag images that are unnecessarily high-resolution, which bloat the file without improving print.

Field	Detail
Action	Auto-fix
Settings	Warn above (dpi, default 600)
Issue	Some images have higher resolution than needed (`{actual.max}` DPI), which makes your file larger without improving print quality.
Fix	Downsample the oversized images and re-upload.
Auto-fix	We’ll downsample the oversized images automatically before printing.

Image Color Mode

Which color spaces are allowed for placed images. To convert image colors, use Colors → Document Color Mode with “Convert all” (dedicated image auto-fix here is coming soon).

Field	Detail
Action	Warn
Settings	Allowed (CMYK / Grayscale / RGB)
Issue	One or more images are in `{actual.colorspaces}` color space, but we require images to be in `{target.allowed}` for this product.
Fix	Convert the images to `{target.allowed}` and re-upload.

Image Compression

Which image compression formats are supported.

Field	Detail
Action	Warn
Settings	Disallowed (JPEG, JPEG 2000, Flate/Zip, LZW, CCITT, JBIG2, Uncompressed)
Issue	Your file contains images saved with a compression format we don’t support.
Fix	Re-save the images with a supported compression format and re-upload.
Auto-fix	We’ll re-encode the images with supported compression automatically before printing.

Bit Depth

The minimum color bit depth required for images, to avoid banding.

Field	Detail
Action	Reject
Settings	Minimum (1 / 2 / 4 / 8 / 16 bit, default 8)
Issue	One or more images have too low a color depth, which can cause banding. Use `{target.min}`-bit or higher.
Fix	Re-save your images at a higher bit depth and re-upload.

Get started

Install Filecheck

Core concepts

Admin guide

Specifications

Resources

Minimum Resolution

Maximum Resolution

Image Color Mode

Image Compression

Bit Depth

​Minimum Resolution

​Maximum Resolution

​Image Color Mode

​Image Compression

​Bit Depth

Minimum Resolution

Maximum Resolution

Image Color Mode

Image Compression

Bit Depth